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Theorem funcnv0 6552
Description: The converse of the empty set is a function. (Contributed by AV, 7-Jan-2021.)
Assertion
Ref Expression
funcnv0 Fun

Proof of Theorem funcnv0
StepHypRef Expression
1 fun0 6551 . 2 Fun ∅
2 cnv0 6091 . . 3 ∅ = ∅
32funeqi 6507 . 2 (Fun ∅ ↔ Fun ∅)
41, 3mpbir 231 1 Fun
Colors of variables: wff setvar class
Syntax hints:  c0 4282  ccnv 5618  Fun wfun 6480
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-ext 2705  ax-sep 5236  ax-nul 5246  ax-pr 5372
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-sb 2068  df-mo 2537  df-clab 2712  df-cleq 2725  df-clel 2808  df-ral 3049  df-rex 3058  df-rab 3397  df-v 3439  df-dif 3901  df-un 3903  df-ss 3915  df-nul 4283  df-if 4475  df-sn 4576  df-pr 4578  df-op 4582  df-br 5094  df-opab 5156  df-id 5514  df-xp 5625  df-rel 5626  df-cnv 5627  df-co 5628  df-fun 6488
This theorem is referenced by:  f10  6801  pthdlem1  29746  0trl  30104  0pth  30107
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